Refrigeration coil for circulated air



April 26, 1949. A. A. D. SHANIS 2,468,466

REFRIGERATION COIL FOR CIRCULATED AIR v 7 Filed July 1, 1946 2 Sheets-Sheet l Fly. 1 z

Edy. 2.

INVENTOR.

AmoZdQ-fi'kazzz's 1; ArrZ/viy April 26, 1949- A. A. D. SHANIS 2,468,466

Filed July 1, 1946 I I 2 Sheets-Sheet 2 INVENTOE. Ann old/ 125b am's Arromvsr Patented Apr. 26, 1949 UNITED STATES PATENT OFFICE REFRIGERATION COIL FOR CIRCULATED AIR Arnold A. D. Shanis, Philadelphia, Pa.

Application July 1, 1946, Serial N 0. 680,651

2 Claims. 1

My invention relates to refrigeration and relates particularly to a refrigeration coil.

Heretofore, refrigeration coils have been used in refrigerators whereby evaporated liquids absorb heat and condensin gases absorb cold. When a liquid in a refrigeration machine is forced to evaporate to be a gas, the refrigerant absorbs heat from the surrounding meats and vegetables and all food products liquid or solid thereby lowering their temperatures. Most of the domestic refrigerating machines employ this principle of alternating liquids and gases.

In the prior or the cooling coil used had a plurality of fins thereon, which fins were made of metal to provide a better transfer of heat from the space outside of the coil to the chemical within the coil. Heat was transferred to the chemical from the fins by means of conduction and the area of heat transfer was increased by Virtue of the fins.

The cost of placing fins upon the coil is relatively high and it is for the purpose of reducing this cost and increasing eficiency that my invention is directed.

Another object of my invention is to provide a coil for a refrigerator which coil may be used as a freezer plate.

Another object of my invention is to provide a refrigeration coil wherein all of the liquid con-- tained therein will be vaporized.

Another object of my invention is to provide a length of copper tubing wherein it is constructed to serve as a self-holding spring as well as a cooling coil.

Another object of my invention is to provide a coil for a refrigerator wherein the frost collecting upon the coil is kept at a minimum amount.

Other objects of my invention are to provide an improved device of the character described, which is sturdy in construction, and which is highly efficient in operation.

With the above and related objects in view, my invention consists in the details of construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accompanying drawing in which:

Fig. l is a fragmentary View of a refrigerator embodyin a refrigeration coil of my invention.

Fig. 2 is a. side view of the refrigeration coil of my invention.

Fig. 3 is a front view of the refrigeration coil of my invention.

Fig. 4 is a side view of the refrigeration coil.

Fig. 5 is a top view of the refrigeration coil and blower.

Fig. 6 is a front view of the refrigeration coil and blower.

Fig. '7 is a bottom view of the refrigeration coil and blower.

Fig. 8 is an end view of the refrigeration coil and blower.

Referring now in detail to the drawing, I show a refrigerator designated as A, having a centrifugal blower with an impeller, generally designated as B. The purpose of the impeller B is to draw warm air from one portion of the refrigerator and direct it over a coil, generally designated as C.

The coil C comprises a length of copper tubing wound into the form of a helix with its spaced convolutions each of elliptical shape, that is, the coil generally has a configuration of an ellipse but it advances for each turn. It is very important that each convolution is arranged to tilt at an angle of approximately 45 to the horizontal plane for the following purposes:

(it) Of serving as a tension spring against the outer shield or shell for the purpose of holding itself within the shell and (b) The coil contacts the metallic holding member or shell so that there is heat transfer at the point of contact of the members or components.

The coil C takes on substantially the position of being at an angle of 45 to the horizontal plane and of being 45 to the vertical plane. The individual loop if! of each segment of the coil takes on a position of 45 to the vertical plane and 45 to the horizontal plane.

Within the coil is a series of circular loops F wound into the form of a helix in continuation which are a contiguous part of the coil C. The purpose and function of the central loops F is to obtain a complete vaporization of the gases within the central coil. At the inlet end of the coil is an nlet fitting through which the refrigerant d enters the coil at a relatively high pressure from an expansion valve (not shown). After the liquid enters the coil through the inlet E, it is vaporized by absorpion of heat from the surrounding air which is blown into contact with the coii surface. As the refrigerant passes from one convolution It into the next convolution it is more and more vaporized by absorbing heat. The internal loop F serves as an auxiliary vaporizer where all of the liquid which may arrive within the loop is completely vaporized. Hence, com- I claim as my invention:

1. In a refrigerator, the combination of an impeller, a helical coil having spaced convolutions of elliptical form, said impeller being mounted adjacent said coil and being adapted to direct warm air from within said refrigerator upon said coil whereby to effect complete vaporization of a liquid refrigerant flowing through said coil, and

a". met'aleenclosure f or i said ricoil; 'said enclosure --'ha ving-opposite side walls respectively in frictional engagement with correspondingly opposite ""sides of said coil, and said coil being internally 'providedwvithanc'extension thereof in the form of a helix having a plurality of substantially circular convolutions.

a pluralityt of: port iopenings 28%? therein twhi'ch communicate with theinterior of the-refrigerator chamber and through which the air cooled within the shell G is outwardly directed by the operation of the impeller B.

Mounted adjacent the side is the centrifugal blower with an impeller which draws warm air the air over the coil C.

The bottom ports force the wall air direct onto the merchandise. Even though the coil-"oflmy invention is brought to=a temperature of 6 F. no r :frostis createdi uponet-he shield.

The effect of my coil is to reduce theiarn'ount of itrost' rwhich collects iOrii the r cooling: coil and the relative humidity of the air withirr'ithevcoil vis kept-highland for-zany. moisture which forms, I provide means for carrying it fromzsthezinterior nor the refrigerator so that: thelgoods J-is 'snotli dan1- aged.

iiThe' shelk G :by virtue l-of. lits physical: contact ia'ce. ".f'I heishellaalsoi mayibe'idipped in.a;tinbath "iforrtusionbetweenthe-primary (the coil) andthe tsecondary-l (the: shell )5 surfaces.

from one portion of the refrigerator-andblows' iwith themcoil is:used as: a:secondary-coolingssurl 2."In a'r'efrigerator, a coil having a plurality yofmspaced elliptical convolutions, an impeller to direct warm air from within the refrigerator to "and'upon said coil, a metallic casing for said coil, said metallic casin having top, bottom and. oppo- 'site si-de- 'wallshlosely embracing said coil, the top and bottom walls" of the "casing having formed "therein a plurality of air discharge ports through which air cooledhysaid-coil is'ci-rc'ulated' outwardlyof thecasing by the action of said impeller.

1' ARNQLD A. D.-: 'SHANIS.

REFERENCES CITED The followingreferences are of're'cord in' the file of. this patent:

.UNITED STATES. PATENTS ZfItEiS' tO'JbQ noted thatawith:myiconstructionof l -Number Name -Date the shell and the utilization of the coil its forms a 13913931 Booth "'June 13, 1933 'ispringi-contact. 23033983 I Greenwald J Mar.- 17, 1936 's-Althoughrmy inventiomhas' beenvdescribed in 2,038,434 Lipman Apr.21,- 1936 "t'considerable:detail;suchod'escription is intended 2042l142 'Campbe'll "'May"26, 1 936 nasa bein rzillustrativer rather than limiting, since- 1 230563862 "=Ma'rkley -*Oct. 6,-'-'i9-36 izthetrinventi'on rmay bevariously?embodied; and 2,159,907 Morris -3 y 23, 1939 ti-theiseopeuof;theriinventionisstorbeidetermined as 2}260,608 Cormack Oct. 28, -1941 tzlc'laimed. 2,442',7i19 Booth June 1, 1948 

